
讲师表单
<template>
  <div class="app-container">
    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"/>
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" controls-position="right" min="0"/>
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <!--
            数据类型一定要和取出的json中的一致，否则没法回填
            因此，这里value使用动态绑定的值，保证其数据类型是number
          -->
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="2" label="首席讲师"/>
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career"/>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
      </el-form-item>

      <!-- 讲师头像：TODO -->
      <!-- 讲师头像 -->
      <el-form-item label="讲师头像">
        <!-- 头衔缩略图 -->
        <pan-thumb :image="teacher.avatar"/>
        <!-- 文件上传按钮 -->
        <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像</el-button>

        <!--
          ajax不能上传文件 
          v-show：是否显示上传组件
          :key：类似于id，如果一个页面多个图片上传控件，可以做区分
          :url：后台上传的url地址
          @close：关闭上传组件
        @crop-upload-success：上传成功后的回调-->
        <image-cropper
          v-show="imagecropperShow"
          :width="300"
          :height="300"
          :key="imagecropperKey"
          :url="BASE_API+'/admin/oss/file/upload'"
          field="file"
          @close="close"
          @crop-upload-success="cropSuccess"
        />
      </el-form-item>
      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>
<script>
import teacher from "@/api/teacher";
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'
const defaultform = {
  name: "",
  sort: 0,
  level: 1,
  career: "",
  intro: "",
  avatar: ""
};
export default {
  components: {
    ImageCropper ,PanThumb
  },
  data() {
    return {
      teacher: {
        name: "",
        sort: 0,
        level: 1,
        career: "",
        intro: "",
        avatar: ""
      },
      saveBtnDisabled: false,// 保存按钮是否禁用,
      BASE_API: process.env.BASE_API, // 接口API地址
      imagecropperShow: false, // 是否显示上传组件
      imagecropperKey: 0 // 上传组件id
    };
  },
  watch: {
    $route(to, from) {
      this.init();
    }
  },
  created() {
    // this.saveBtnDisabled = false
    //页面加载时候created执行
    //判断跳转的路由路径是否有id值
    //如果有id就根据id查询
    // if (this.$route.params && this.$route.params.id) {
    //   const id = this.$route.params.id;
    //   this.fetchDataById(id);
    // }
    this.init();
  },
  methods: {
    //判断修改还是添加，如果添加清空列表页面
    init() {
      if (this.$route.params && this.$route.params.id) {
        const id = this.$route.params.id;
        this.fetchDataById(id);
      } else {
        //第一种方式
        //  this.teacher.name = '';
        //  this.teacher.sort = 0;
        //第二种方式 可能低版本浏览器不兼容
        this.teacher = { ...defaultform };
      }
    },
    //为了后面的修改
    saveOrUpdate() {
      this.saveBtnDisabled = true;
      //这种方式也可以 ：saveBtnDisabled :true
      //判断做添加还是修改
      if (!this.teacher.id) {
        //里面没有id值
        //添加的方法
        this.saveData();
      } else {
        this.updateData();
      }
    },
    //根据id查询的方法
    fetchDataById(id) {
      teacher
        .getTeacherById(id)
        .then(response => {
          this.teacher = response.data.eduTeacher;
        })
        .catch(response => {
          this.$message({
            type: "error",
            message: "获取数据失败"
          });
        });
    },
    //修改讲师的方法
    updateData() {
      teacher
        .updateTeacherById(this.teacher)
        .then(response => {
          this.$message({
            type: "success",
            message: "修改成功!"
          });
        })
        .then(response => {
          this.$router.push({ path: "/teacher" });
        })
        .catch(response => {
          this.$message({
            type: "error",
            message: "修改失败"
          });
        });
    },

    // 保存
    saveData() {
      teacher
        .addTeacher(this.teacher)
        .then(response => {
          this.$message({
            type: "success",
            message: "添加成功!"
          });
        })
        .then(response => {
          //天机之后跳转回列表页面
          //路由跳转
          this.$router.push({ path: "/teacher" });
        })
        .catch(response => {
          this.$message({
            type: "error",
            message: "保存失败"
          });
        });
    },
     // 上传成功后的回调函数
    cropSuccess(data) {
      console.log(data)
      this.imagecropperShow = false
      this.teacher.avatar = data.url
      // 上传成功后，重新打开上传组件时初始化组件，否则显示上一次的上传结果
      this.imagecropperKey = this.imagecropperKey + 1
    },
    // 关闭上传组件
    close() {
      this.imagecropperShow = false
      // 上传失败后，重新打开上传组件时初始化组件，否则显示上一次的上传结果
      this.imagecropperKey = this.imagecropperKey + 1
    }
  }
};
</script>

